Ningbo Zhenhai Dongming Craftwork Co., Ltd Specializes in manufacture of pu(polyurethane) stress ball, With rich experience in PU foam production, presently we have advanced equipment and production lines, being capable to help customers develop the hard pu item and accept OEM orde.Stress balls are not only the stress relievers to help people decompress, they are the perfect advertisement and marketing tool to promote your Company...